Acornas Search (Acorna 05)

Acorna's Search  - Anne McCaffrey, Elizabeth Ann Scarborough A book that you'd get lost in unless you've read the rest of the series. When people start disappearing as they explore their destroyed world to prepare for terraforming, people start disappearing and when they start looking they discover an underground city. Readable but not impressive. It wasn't a book that would urge me to continue reading the series.